32 lines
843 B
Rust
32 lines
843 B
Rust
// ignore-windows: Concurrency on Windows is not supported yet.
|
|
#![feature(core_intrinsics)]
|
|
|
|
use std::intrinsics::atomic_load;
|
|
use std::sync::atomic::AtomicUsize;
|
|
use std::thread::spawn;
|
|
|
|
#[derive(Copy, Clone)]
|
|
struct EvilSend<T>(pub T);
|
|
|
|
unsafe impl<T> Send for EvilSend<T> {}
|
|
unsafe impl<T> Sync for EvilSend<T> {}
|
|
|
|
pub fn main() {
|
|
let mut a = AtomicUsize::new(0);
|
|
let b = &mut a as *mut AtomicUsize;
|
|
let c = EvilSend(b);
|
|
unsafe {
|
|
let j1 = spawn(move || {
|
|
*(c.0 as *mut usize) = 32;
|
|
});
|
|
|
|
let j2 = spawn(move || {
|
|
//Equivalent to: (&*c.0).load(Ordering::SeqCst)
|
|
atomic_load(c.0 as *mut usize) //~ ERROR Data race detected between Atomic Load on Thread(id = 2) and Write on Thread(id = 1)
|
|
});
|
|
|
|
j1.join().unwrap();
|
|
j2.join().unwrap();
|
|
}
|
|
}
|